Originally Posted by Delta Tango
It is correct, just not unambiguous.
It's incorrect for what he wanting to communicate.
Also, it's incorrect period, because the motion he described required two seperate axes, not coaxial movement. Try to move your fingers like that coaxially, and you'll need to twist your arms like a rubberband on a balsawood airplane.
p.s. I agree with BookCat, say it just like you said it, if that's why you were asking.
If the whole of us super-geniuses here can't think of one clear term, you might as well coin one yourself, cuz I bet there ain't one!